Invited to work at the open workshop at the Centro de Arte Moderno, he made prints from 1982 to 1983 and soon after, he embarked on a series of paintings.
In the mid-1980s he was asked to collaborate as an assistant curator at the Instituto Cultural Cabañas—his career in architecture officially replaced with art.
For the next several years, his paintings and prints were dominated by representational subject matter, but by the 1990s his approach changed to more conceptual concerns.
He has used and experimented with encaustic painting with beeswax, natural pigments and oil colors, on amate paper or wooden panels.
Toussaint's work in part of permanent collections at Tucson Museum of Art, Udinotti Museum of Figurative Art, Casa de la Cultura de Zapopan and Museo Raul Anguiano in Guadalajara, México.